By far the most amazing internet radio service (and application) YET!
Presenting www.songza.com
Custom playlists tailored to YOUR mood, and curated by music experts.
As someone who loves internet radio and uses it as a discovery tool, this is possibly the greatest thing since sliced bread.
I make playlists in itunes for different moods, but get bored of my music quickly, so this fits in perfectly, whether you’re having a party, chillin in your backyard, at the beach, etc.
only available in the us 
It’s probably North America then, because I’ve been using it in Canada.
Try the app if you’re on iPhone or Android, I don’t think they have the same limitations.
If you’re really interested you can also access it via a free VPN program, like hotspot shield.
There are a bunch of sites out there.. like 8track and such.
But nice find.
It only works in NA as im from Canada aswell.
I see “8 Tracks” has an app too, which is sweet.
What other sites (apps) are there that tailor playlists to listening moods?